10pcs Hirobo HI2509015 Roll Pins 2 x 12 Replacement Pack for RC Helicopters  [HI2509015]

Overview of roll pin use in model helicopters

The Hirobo HI2509015 roll pin 2 x 12 is supplied as a compact 10-piece set intended for use in RC-scale helicopters and other lightweight model airframes where a short roll pin provides axial retention.

They are commonly used to retain shafts, secure tiny linkages, and lock parts that need a transverse retention element. The 2 x 12 sizing identifies the nominal diameter and length, helping you select a replacement that matches existing holes without modifying other components.

Installation is straightforward: position the pin and press it evenly until it is seated; the pin serves as a simple non-threaded retention device that resists axial movement in rotor assemblies and control linkages. Keep spare pins available to maintain original fit after service or rebuilds.